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Original HP Memory module board (256k)
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Original HP Memory controller board - Installs in cardcage
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Original HP CPU back plane board - In upper rear right of CPU cabinet
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Original HP Memory back plane board - In upper rear left of CPU cabinet
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Original HP I/O back plane board - In upper rear of I/O cabinet
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Original HP Power distribution board - For +/-12V and +5V DC power supply (PS1)
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Original HP Power distribution board - For +5V DC power supply (PS4)
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Original HP Battery control module board - In bottom center of CPU cabinet
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Original HP Upper front plane board - Interconnects boards in slots 10 thru 15
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Original HP Lower front plane board - Interconnects boards in slots 10 thru 15
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Original HP System status display panel (SSDP) board (for computers with 'B' series power supplies ONLY)
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Original HP Front plane board - Connects the cache controller (CACX) board (Slot 17) to the cache memory assembly (CMAX) board (Slot 18)
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Original HP Register/arithmetic logic unit (RALU0/RALU1/RALU2/RALU3) - In slots 10, 11, 13, and 14 (4 used)
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Original HP Current instruction register (CIR) board - In slot 8
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Original HP V-BUS board - In slot 7
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